EP0657111B1 - Visor with variable transmission for headgear - Google Patents
Visor with variable transmission for headgear Download PDFInfo
- Publication number
- EP0657111B1 EP0657111B1 EP94402802A EP94402802A EP0657111B1 EP 0657111 B1 EP0657111 B1 EP 0657111B1 EP 94402802 A EP94402802 A EP 94402802A EP 94402802 A EP94402802 A EP 94402802A EP 0657111 B1 EP0657111 B1 EP 0657111B1
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- EP
- European Patent Office
- Prior art keywords
- visor
- zone
- visor according
- pilot
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/18—Face protection devices
- A42B3/22—Visors
- A42B3/226—Visors with sunscreens, e.g. tinted or dual visor
Definitions
- the present invention relates to a head equipment visor with variable light transmission. It applies in particular to helmet equipment for aircraft pilots. More generally it applies to protection systems that need to be released from slow transmission constraints notably due to the element absorbent consisting of photochromic agents.
- a visor fitted to an aircraft pilot helmet presents generally two essential protective functions.
- a first protection is a facial protection against mechanical aggressions outside. This protection is usually provided by a blade often cylindrical or spherical in transparent thermoplastic material, in polycarbonate for example.
- a second protection is an eye protection with respect to the solar radiation
- the visor can therefore tint or lighten absorb more or less light energy reversibly by function of ambient light due to the presence of substances chemicals integrated into the thickness or surface of the visor. These substances which vary the color of the material which they integrate into depending on the brightness are called photochromic.
- these photochromic substances are made up of molecules whose structure changes reversibly under the effect of photons they receive, this modification causing a Color change.
- Known photochromic substances and used for example are the families of spiropyrans or spiroxazines.
- variable transmission visors composed of a transparent thermoplastic strip, the photochromic substance being incorporated during injection of the part or sprayed on the surface or by molding for example. These visors absorb part of the energy identical incident light at any point on the visor.
- a plastic based on photochromic substances can present in a clear state a light transmission of the order of 75% at 85%. In the presence of strong light, the plastic reaches a dark state and the transmission may decrease to values between 20% and 30% for example.
- Light and dark transmissions depend on the nature of the photochromic substances used or the composition of the mixture of these. These transmissions also depend on the concentrations respective photochromic substances in the thickness or on the surface of the visor.
- the reaction times of Photochromic substances are generally long. These times of reaction are of the order of a minute to darkening and several minutes to lightening.
- a pilot needs a clear visor when the light is weak and a dark visor when it meets these lighting conditions intense, when passing over the cloud layer for example.
- a conventional photochromic visor as defined above poorly satisfies the pilot's need. It is usually too light or too dark due to the aforementioned too long reaction times inherent in the very nature of photochromic substances, it is in particular the passage from the dark state to the light state which is done too late. This has consequence of hampering the pilot's vision and therefore of reducing his safety.
- Japanese patent JP-A-04 245 904 presents a visor head gear with variable transmission.
- a patent application European EP-A-0099524 and a German patent application DE-A-41 06 019 present an optical device with variable transmission.
- the object of the invention is to overcome the aforementioned drawbacks in particular by proposing a visor architecture adapted to the work accomplished by the visor wearer, an airplane pilot for example, this architecture enabling the carrier to be freed from the aforementioned reaction times.
- the invention relates to a visor of equipment for variable light transmission head as defined in claim 1.
- the main advantages of the invention are that it improves the safety and comfort of vision of the wearer of the visor, which it allows in the helmet visual case with projection of symbols on the visor, a increased contrast of the image projected inside the visor, thus improving the readability of information, that it is economical and easy to implement.
- Figure 1 shows by way of example a pilot 1 wearing a helmet 2 fitted with a visor 3.
- the pilot is for example in cockpit 4 of a airplane 5 of which only the front part is shown.
- the pilot must be able to look outside the plane and on-board instruments 6 with as much comfort as possible. He should not especially not be bothered by intense light rays.
- the structure of the visor according to the invention uses the fact that not all parts of the visor are functionally identical.
- the visor according to the invention then comprises at least two zones different absorption of light, that of higher absorption corresponding to the part of the wearer's visual field that requires worse perception than the lowest absorption part.
- the carrier is an airplane pilot
- the first part corresponds by example from the outside of the plane and the second part from the on-board instruments.
- the transition are different from one zone to another, that is to say that the speeds of reaction of photochromic substances or LCD materials are different from one area to another.
- the variation of the transmission is then more or slower from one area to another. In the case of application to a pilot plane, it is thus advantageous that the transition speed of the zone as fast as possible.
- the variable transmission can be ensured by a combination of photochromic and LCD technologies to obtain speeds of different transition from one area to another.
- Figure 2 illustrates the principle of making a visor according to the invention equipping the pilot represented in FIG. 1.
- the visor 3 is broken down into two zones 31, 32 corresponding to vertical viewing angles ⁇ 1 and ⁇ 2 swept by the gaze of the pilot 1 and originating from the pilot's eye 7 1 for example.
- the direction chosen as the origin for the pilot's gaze is for example the direction 8 seen by the eye 7 when the latter is at rest.
- the upper zone 31 of the visor corresponds to an angle ⁇ 1 between a first angle ⁇ H and a second angle ⁇ HB taken relative to the original direction 8 and the lower zone 32 corresponds to an angle ⁇ 2 between the second ⁇ HB and a third angle ⁇ B taken with respect to the origin direction 8.
- ⁇ H can be equal to + 70 °, ⁇ HB at -25 ° and ⁇ B at -35 °.
- the upper zone 31 of the visor 3 corresponds to a viewing angle of between + 70 ° above and -25 ° below the original direction 8 and that the low zone 32 of the visor 3 corresponds to a viewing angle between -25 ° and -35 ° below the original direction 8.
- the upper zone 31 is used for example essentially to look at outside the plane. This part notably provides good protection against solar radiation.
- the lower zone 32 for example must remain lighter than the upper zone 31 even in the event of intense light radiation. Indeed in all circumstances but especially when the pilot goes from a sunny space to a dark space where visibility is reduced, he needs to consult his on-board instruments. It is then the lower zone 32 of the visor which is stressed. The pilot also need good color perception to read symbols on screens and other on-board indicators 6. It is therefore harmful to the pilot that reaction times too long for the transition to the lightening of the visor disturbs its reading of the on-board instruments.
- photochromic substances and their concentration is done for example so as to promote a strong absorption in the upper zone 31 of the visor.
- the transmission range of this area can by example vary between 75% and 20%, from light to dark.
- the invention has an advantage additional because it allows an increase in image contrast projected inside the visor 3 onto its upper zone 31. The legibility of the information is thus greatly increased.
- the choice of photochromic substances is such that this area absorbs less light than the upper zone 31 and its transmission range of the light is reduced compared to this high area.
- Transmission range of the lower zone 32 can for example vary between 85% and 40% of the clear state in the dark state.
- the photochromic substances of the low zone 32 are for example also chosen so as to increase the reaction rates and to obtain as neutral as possible attenuation of the colors on the whole visible spectrum to promote a good perception of on-board indicators and cathode visualization screens for example.
- the absorption means used in the visor according to the invention can for example be photochromic substances as described previously, or any other type of absorbent.
- the visor can be broken down into more than two areas. So, for example, to the two areas described above could be added a zone dedicated to reading specific indicators such as for example a head-up display console requiring in particular good appreciation of the color of certain symbols.
- the layout of the zones may not be distributed from top to bottom, but also for example from right to left, in the case in particular where superimposed on reaction time constraints appreciation of colors or shapes according to areas of good spaces defined around the pilot.
- the application of the visor according to the invention has been presented for an airplane pilot, however it can be used for other applications, especially for pilots of all types of aircraft.
Description
La présente invention concerne une visière d'équipement de tête à transmission variable de lumière. Elle s'applique notamment à l'équipement de casques de pilotes d'aéronefs. Plus généralement elle s'applique à des systèmes de protection qu'il est nécessaire de libérer des contraintes de variation lentes de transmission notamment dues à l'élément absorbant constitué d'agents photochromes.The present invention relates to a head equipment visor with variable light transmission. It applies in particular to helmet equipment for aircraft pilots. More generally it applies to protection systems that need to be released from slow transmission constraints notably due to the element absorbent consisting of photochromic agents.
Une visière équipant un casque de pilote d'aéronef présente généralement deux fonctions essentielles de protection. Une première protection est une protection faciale vis à vis des agressions mécaniques extérieures. Cette protection est habituellement assurée par une lame souvent cylindrique ou sphérique en matériau thermoplastique transparent, en polycarbonate par exemple.A visor fitted to an aircraft pilot helmet presents generally two essential protective functions. A first protection is a facial protection against mechanical aggressions outside. This protection is usually provided by a blade often cylindrical or spherical in transparent thermoplastic material, in polycarbonate for example.
Une deuxième protection est une protection oculaire vis à vis du rayonnement solaire, la visière pouvant se teinter ou s'éclaircir donc absorber plus ou moins d'énergie lumineuse de manière réversible en fonction de la luminosité ambiante grâce à la présence de substances chimiques intégrées dans l'épaisseur ou en surface de la visière. Ces substances faisant varier la coloration du matériau qu'elles intègrent en fonction de la luminosité sont dites photochromiques.A second protection is an eye protection with respect to the solar radiation, the visor can therefore tint or lighten absorb more or less light energy reversibly by function of ambient light due to the presence of substances chemicals integrated into the thickness or surface of the visor. These substances which vary the color of the material which they integrate into depending on the brightness are called photochromic.
Plus particulièrement, ces substances photochromiques sont constituées de molécules dont la structure se modifie de façon réversible sous l'effet de photons qu'elles reçoivent, cette modification entraínant un changement de couleur. Des substances photochromiques connues et utilisées sont par exemple les familles de spiropyrannes ou de spiroxazines.More particularly, these photochromic substances are made up of molecules whose structure changes reversibly under the effect of photons they receive, this modification causing a Color change. Known photochromic substances and used for example are the families of spiropyrans or spiroxazines.
Il existe des visières à transmission variable composées d'une lame de thermoplastique transparent, la substance photochromique étant incorporée lors de l'injection de la pièce ou déposée en surface au pistolet ou par moulage par exemple. Ces visières absorbent une partie de l'énergie lumineuse incidente de manière identique en tout point de la visière.There are variable transmission visors composed of a transparent thermoplastic strip, the photochromic substance being incorporated during injection of the part or sprayed on the surface or by molding for example. These visors absorb part of the energy identical incident light at any point on the visor.
Un plastique à base de substances photochromiques peut présenter à l'état clair une transmission de la lumière de l'ordre de 75% à 85%. En présence de forte luminosité, le plastique atteint un état foncé et la transmission peut baisser jusqu'à des valeurs comprises entre 20% et 30% par exemple. Les transmissions à l'état clair et à l'état foncé dépendent de la nature des substances photochromiques utilisées ou de la composition du mélange de celles-ci. Ces transmissions dépendent aussi des concentrations respectives de substances photochromiques dans l'épaisseur ou en surface de la visière. A la température ambiante, les temps de réaction des substances photochromiques sont généralement longs. Ces temps de réaction sont de l'ordre de la minute à l'assombrissement et de plusieurs minutes à l'éclaircissement.A plastic based on photochromic substances can present in a clear state a light transmission of the order of 75% at 85%. In the presence of strong light, the plastic reaches a dark state and the transmission may decrease to values between 20% and 30% for example. Light and dark transmissions depend on the nature of the photochromic substances used or the composition of the mixture of these. These transmissions also depend on the concentrations respective photochromic substances in the thickness or on the surface of the visor. At room temperature, the reaction times of Photochromic substances are generally long. These times of reaction are of the order of a minute to darkening and several minutes to lightening.
Pour certaines fonctions demandées, ces temps de réaction sont trop lents. En particulier pour assurer la protection oculaire de pilotes contre le rayonnement solaire, ces performances sont tout à fait insuffisantes pour certains types d'avions.For certain requested functions, these reaction times are too slow. In particular to ensure the eye protection of pilots against solar radiation, these performances are completely insufficient for certain types of aircraft.
Un pilote a besoin d'une visière claire lorsque la luminosité est faible et d'une visière foncée lorsqu'il rencontre ces conditions d'éclairement intenses, lors d'un passage au dessus de la couche nuageuse par exemple. Une visière photochromique classique telle que définie précédemment satisfait mal au besoin du pilote. Elle est en général ou trop claire ou trop foncée en raison des temps de réactions trop longs précités inhérents à la nature même des substances photochromiques, c'est notamment le passage de l'état foncé à l'état clair qui se fait trop tardivement. Cela a pour conséquence de gêner la vision du pilote et donc de diminuer sa sécurité.A pilot needs a clear visor when the light is weak and a dark visor when it meets these lighting conditions intense, when passing over the cloud layer for example. A conventional photochromic visor as defined above poorly satisfies the pilot's need. It is usually too light or too dark due to the aforementioned too long reaction times inherent in the very nature of photochromic substances, it is in particular the passage from the dark state to the light state which is done too late. This has consequence of hampering the pilot's vision and therefore of reducing his safety.
Il est certes connu d'utiliser des solutions du type LCD, LCD signifiant selon la terminologie anglo-saxonne" Liquid Cristal Display", dont les temps de réaction sont courts. Cependant ces solutions s'intègrent bien dans le verre mais très difficilement dans des matériaux en plastique tels que ceux utilisés dans des visières.It is certainly known to use solutions of the LCD, LCD type meaning according to Anglo-Saxon terminology "Liquid Cristal Display", of which reaction times are short. However, these solutions integrate well in glass but very difficult in plastic materials such as those used in visors.
Un brevet japonais JP-A-04 245 904 présente une visière d'équipement de tête à transmission variable. Une demande de brevet européen EP-A-0099524 et une demande de brevet allemand DE-A-41 06 019 présentent un dispositif optique à transmission variable.Japanese patent JP-A-04 245 904 presents a visor head gear with variable transmission. A patent application European EP-A-0099524 and a German patent application DE-A-41 06 019 present an optical device with variable transmission.
Le but de l'invention est de pallier les inconvénients précités notamment en proposant une architecture de visière adaptée au travail accompli par le porteur de visière, un pilote d'avion par exemple, cette architecture permettant de libérer le porteur des temps de réaction précités. The object of the invention is to overcome the aforementioned drawbacks in particular by proposing a visor architecture adapted to the work accomplished by the visor wearer, an airplane pilot for example, this architecture enabling the carrier to be freed from the aforementioned reaction times.
A cet effet, l'invention a pour objet une visière d'équipement de
tête à transmission variable de lumière telle que définie par la revendication
1. To this end, the invention relates to a visor of equipment for
variable light transmission head as defined in
L'invention a pour principaux avantages qu'elle améliore la sécurité et le confort de vision du porteur de la visière, qu'elle permet dans le cas de visuel de casque avec projection de symboles sur la visière, une augmentation du contraste de l'image projetée à l'intérieur de la visière, améliorant ainsi la lisibilité des informations, qu'elle est économique et aisée à mettre en oeuvre.The main advantages of the invention are that it improves the safety and comfort of vision of the wearer of the visor, which it allows in the helmet visual case with projection of symbols on the visor, a increased contrast of the image projected inside the visor, thus improving the readability of information, that it is economical and easy to implement.
D'autres modes particuliers de réalisation selon l'invention
sont indiqués dans les revendications 2 à 12.Other particular embodiments according to the invention
are set out in
D'autres caractéristiques et avantages de l'invention apparaítront à l'aide de la description qui suit faite en regard de dessins annexés qui représentent:
- la figure 1, un pilote portant un casque équipé d'une visière;
- la figure 2, un principe de réalisation d'une visière selon l'invention.
- Figure 1, a pilot wearing a helmet equipped with a visor;
- Figure 2, a principle of embodiment of a visor according to the invention.
La figure 1 montre à titre d'exemple un pilote 1 portant un casque
2 équipé d'une visière 3. Le pilote est par exemple dans le cockpit 4 d'un
avion 5 dont seulement la partie avant est représentée. Pour remplir
correctement sa mission, le pilote doit pouvoir regarder l'extérieur de l'avion
et les instruments de bord 6 avec le plus de confort possible. Il ne doit
notamment pas être gêné par des rayons lumineux intenses.Figure 1 shows by way of example a
Les temps de réaction pour le passage à l'assombrissement ou à l'éclairement étant donnés, la structure de la visière selon l'invention utilise le fait que toutes les parties de la visière ne sont pas fonctionnellement identiques. La visière selon l'invention comprend alors au moins deux zones d'absorptions différentes de la lumière, celle d'absorption plus élevée correspondant à la partie du champ visuel du porteur qui nécessite une moins bonne perception que la partie d'absorption la moins élevée. Dans le cas où le porteur est un pilote d'avion, la première partie correspond par exemple à la vue de l'extérieur de l'avion et la deuxième partie à la vue des instruments de bord. Pour améliorer l'efficacité de la visière, les vitesses de transition sont différentes d'une zone à l'autre, c'est-à-dire que les vitesses de réaction des substances photochromiques ou des matériaux LCD sont différentes d'une zone à l'autre. La variation de la transmission est alors plus ou moins rapide d'une zone à l'autre. Dans le cas d'application à un pilote d'avion, il est ainsi avantageux que la vitesse de transition de la zone affectée aux instruments de bord soit la plus rapide possible. La transmission variable peut être assurée par une association des technologies photochrome et LCD permettant d'obtenir des vitesses de transition différentes d'une zone à l'autre.Reaction times for transition to darkening or given the illumination, the structure of the visor according to the invention uses the fact that not all parts of the visor are functionally identical. The visor according to the invention then comprises at least two zones different absorption of light, that of higher absorption corresponding to the part of the wearer's visual field that requires worse perception than the lowest absorption part. In the if the carrier is an airplane pilot, the first part corresponds by example from the outside of the plane and the second part from the on-board instruments. To improve the efficiency of the visor, the transition are different from one zone to another, that is to say that the speeds of reaction of photochromic substances or LCD materials are different from one area to another. The variation of the transmission is then more or slower from one area to another. In the case of application to a pilot plane, it is thus advantageous that the transition speed of the zone as fast as possible. The variable transmission can be ensured by a combination of photochromic and LCD technologies to obtain speeds of different transition from one area to another.
La figure 2 illustre le principe de réalisation d'une visière selon l'invention équipant le pilote représenté en figure 1.Figure 2 illustrates the principle of making a visor according to the invention equipping the pilot represented in FIG. 1.
A titre d'exemple, la visière 3 selon l'invention est décomposée en
deux zones 31, 32 correspondant à des angles de vision verticaux α1 et α2
balayés par le regard du pilote 1 et ayant pour origine l'oeil 7 du pilote 1 par
exemple. La direction choisie comme origine pour le regard du pilote est par
exemple la direction 8 vue par l'oeil 7 lorsque ce dernier est au repos. La
zone haute 31 de la visière correspond à un angle α1 compris entre un
premier angle H et un deuxième angle HB pris par rapport à la direction
origine 8 et la zone basse 32 correspond à un angle α2 compris entre le
deuxième HB et un troisième angle B pris par rapport à la direction origine
8. La direction origine 8 correspondant à un angle nul, la valeur algébrique
du premier angle H est supérieure à la valeur algébrique du deuxième
angle HB lequel a sa valeur algébrique supérieure au troisième angle B. A
titre d'exemple, H peut être égal à +70°, HB à -25° et B à -35°. C'est à
dire que dans ce cas, la zone haute 31 de la visière 3 correspond à un angle
de vision compris entre +70° au dessus et -25° en dessous de la direction
origine 8 et que la zone basse 32 de la visière 3 correspond à un angle de
vision compris entre -25° et -35° en dessous de la direction origine 8.By way of example, the visor 3 according to the invention is broken down into two
La zone haute 31 sert par exemple essentiellement à regarder à
l'extérieur de l'avion. Cette partie assure notamment une bonne protection
contre le rayonnement solaire. Pour des raisons de sécurité, la zone basse
32 doit par exemple rester plus claire que la zone haute 31 même en cas de
rayonnement lumineux intense. En effet, en toutes circonstances mais
surtout lorsque le pilote passe d'un espace ensoleillé à un espace sombre
où la visibilité se réduit, il a besoin de consulter ses instruments de bord.
C'est alors la zone basse 32 de la visière qui est sollicitée. Le pilote a aussi
besoin d'une bonne perception des couleurs pour lire les symboles figurant
sur les écrans et autres indicateurs de bord 6. Il est donc dommageable pour
le pilote que des temps de réaction trop longs pour le passage à
l'éclaircissement de la visière perturbent sa lecture des instruments de bord.The
Le choix des substances photochromiques et leur concentration
se fait alors par exemple de manière à favoriser une forte absorption dans la
zone haute 31 de la visière. La plage de transmission de cette zone peut par
exemple varier entre 75% et 20%, de l'état clair à l'état foncé.The choice of photochromic substances and their concentration
is done for example so as to promote a strong absorption in the
Il est à noter que dans le cas de visuel de casque avec projection
de symboles sur la visière 3, l'invention présente un avantage
supplémentaire car elle permet une augmentation du contraste de l'image
projetée à l'intérieur de la visière 3 sur sa zone haute 31. La lisibilité des
informations est ainsi fortement augmentée.It should be noted that in the case of a helmet visual with projection
of symbols on the visor 3, the invention has an advantage
additional because it allows an increase in image contrast
projected inside the visor 3 onto its
En ce qui concerne la zone basse 32 de la visière 3, le choix des
substances photochromiques est tel par exemple que cette zone absorbe
moins la lumière que la zone haute 31 et que sa plage de transmission de la
lumière est réduite par rapport à cette zone haute. La plage de transmission
de la zone basse 32 peut par exemple varier entre 85% et 40% de l'état clair
à l'état sombre. Les substances photochromiques de la zone basse 32 sont
par exemple aussi choisies de façon à augmenter les vitesses de réaction et
à obtenir une atténuation aussi neutre que possible des couleurs sur tout le
spectre visible pour favoriser une bonne perception des indicateurs de bord
et écrans cathodiques de visualisation par exemple.As regards the
Les moyens d'absorption utilisés dans la visière selon l'invention peuvent être par exemple des substances photochromiques comme décrit précédemment, ou encore tout autre type d'absorbant.The absorption means used in the visor according to the invention can for example be photochromic substances as described previously, or any other type of absorbent.
La visière peut être décomposée en plus de deux zones. Ainsi, par exemple, aux deux zones décrites précédemment pourrait s'ajouter une zone dédiée à la lecture d'indicateurs spécifiques comme par exemple une console de visualisation tête haute nécessitant notamment une bonne appréciation de la couleur de certains symboles.The visor can be broken down into more than two areas. So, for example, to the two areas described above could be added a zone dedicated to reading specific indicators such as for example a head-up display console requiring in particular good appreciation of the color of certain symbols.
La disposition des zones peut ne pas être répartie de haut en bas, mais aussi par exemple de droite à gauche, dans le cas notamment où à des contraintes de temps de réaction se superposent des problèmes d'appréciation de couleurs ou de formes selon des zones d'espaces bien définies entourant le pilote.The layout of the zones may not be distributed from top to bottom, but also for example from right to left, in the case in particular where superimposed on reaction time constraints appreciation of colors or shapes according to areas of good spaces defined around the pilot.
L'application de la visière selon l'invention a été présentée pour un pilote d'avion, cependant elle peut être utilisée pour d'autres applications, notamment pour les pilotes de tous types d'aéronefs.The application of the visor according to the invention has been presented for an airplane pilot, however it can be used for other applications, especially for pilots of all types of aircraft.
Claims (12)
- Visor for headgear with variable transmission of light, the visor comprising at least two differently light-absorbing zones (31, 32), each zone being dedicated to a zone of the exterior space (α1, α2) scanned by the gaze, characterized in that the transmissions vary from one zone to another with different rates of transition.
- Visor according to Claim 1, characterized in that it comprises an upper zone (31) and a lower zone (32), the upper zone absorbing more light than the lower zone (32).
- Visor according to Claim 2, characterized in that the transition rate of the lower zone (32) is greater than the transition rate of the upper zone (31).
- Visor according to either one of Claims 2 or 3, characterized in that the lower zone (32) has a range of transmission making it possible to obtain higher transmissions than in the upper part.
- Visor according to any one of Claims 2 to 4, characterized in that the visor (3) forming part of the gear of a pilot (1) of an aircraft (5), the upper zone serves for looking at the exterior (α1) of the aircraft (5).
- Visor according to any one of Claims 2 to 5, characterized in that the visor (3) forming part of the gear of a pilot (1) of an aircraft, the lower zone (32) serves for looking at the instrument panel (6) of the aircraft.
- Visor according to any one of the preceding claims, characterized in that the zone (31) of highest absorption has a range of transmission of between 75% and 20%.
- Visor according to any one of the preceding claims, characterized in that the zone (32) of lowest absorption has a range of transmission of between 85% and 40%.
- Visor according to any one of the preceding claims, characterized in that the visor (3) comprising photochromic substances, the zones (31, 32) of the visor comprise different concentrations of photochromic substances.
- Visor according to any one of the preceding claims, characterized in that the visor (3) comprising photochromic substances, the zones (31, 32) of the visor comprise different photochromic substances.
- Visor according to any one of Claims 1 to 8, characterized in that the variable transmission function is afforded by an LCD material.
- Visor according to any one of Claims 1 to 6, characterized in that the variable transmission is afforded by an association of the photochrome and LCD technologies making it possible to obtain different rates of transition from one zone to another.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9314870 | 1993-12-10 | ||
| FR9314870A FR2713449B1 (en) | 1993-12-10 | 1993-12-10 | Head gear visor with variable transmission. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0657111A1 EP0657111A1 (en) | 1995-06-14 |
| EP0657111B1 true EP0657111B1 (en) | 1999-05-12 |
Family
ID=9453806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94402802A Expired - Lifetime EP0657111B1 (en) | 1993-12-10 | 1994-12-06 | Visor with variable transmission for headgear |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5640711A (en) |
| EP (1) | EP0657111B1 (en) |
| JP (1) | JPH07267194A (en) |
| CA (1) | CA2137619A1 (en) |
| DE (1) | DE69418434T2 (en) |
| ES (1) | ES2132360T3 (en) |
| FR (1) | FR2713449B1 (en) |
| IL (1) | IL111726A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2742230B1 (en) * | 1995-12-12 | 1998-01-09 | Sextant Avionique | ACCELEROMETER AND MANUFACTURING METHOD |
| FR2742636B1 (en) * | 1995-12-26 | 1998-02-06 | Sextant Avionique | HELMET WITH NIGHT VISION DEVICE WITH OPTIMIZED SAFETY AND ERGONOMICS |
| US6195206B1 (en) | 1998-01-13 | 2001-02-27 | Elbit Systems Ltd. | Optical system for day and night use |
| SE514273C2 (en) * | 1999-05-11 | 2001-01-29 | Peltor Ab | Protective Visor |
| US20110209319A1 (en) * | 2003-12-05 | 2011-09-01 | Williams Scott M | Photosensitive cockpit windshield |
| US20080225422A1 (en) * | 2005-09-15 | 2008-09-18 | Koninklijke Philips Electronics, N.V. | Optical Filter |
| US7328998B2 (en) * | 2006-05-31 | 2008-02-12 | Hobbs Raymond L | Specially tinted lenses for sunglasses for use during flying |
| NL1033103C2 (en) * | 2006-12-21 | 2008-06-24 | Hd Inspiration Holding B V | Visor with UV sensitive material. |
| ITVI20090262A1 (en) * | 2009-10-29 | 2011-04-30 | Roberto Anzolin | PERFECTED PROTECTIVE HELMET |
| IL213727A (en) | 2011-06-22 | 2015-01-29 | Elbit Systems Ltd | Helmet mounted display system adjustable for bright ambient light conditions |
| IL235088A (en) | 2014-10-07 | 2017-06-29 | Elbit Systems Ltd | Helmet system having adjustable light transmission |
| US20230350114A1 (en) * | 2022-04-27 | 2023-11-02 | Hamilton Sundstrand Corporation | Photochromatic transition glass for a helmet of a space suit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2815508A (en) * | 1954-11-15 | 1957-12-10 | Leonard P Frieder | Helmet with retractable eye shield |
| US4080051A (en) * | 1976-03-18 | 1978-03-21 | American Optical Corporation | Preparation of photochromic gradient lenses of cosmetically improved color |
| FR2394261A1 (en) * | 1977-06-16 | 1979-01-12 | Gonichon Pascal | Windshield for motor cycle helmet - is made of transparent plastics material covered by thin metallic layer |
| US4482326A (en) * | 1982-01-26 | 1984-11-13 | Instrument Flight Research Inc. | Flight training glasses |
| DE3225863A1 (en) * | 1982-07-10 | 1984-01-12 | Heinz Dr. 5000 Köln Kunert | EYE LENSES, IN PARTICULAR FOR MOTOR VEHICLE HANDLEBARS |
| IL93602A0 (en) * | 1990-03-02 | 1990-12-23 | Neta Holland | Light-transmissive window and electro-optical control thereof |
| JPH04245904A (en) * | 1991-01-29 | 1992-09-02 | Suzuki Motor Corp | Dimming shield for helmet |
-
1993
- 1993-12-10 FR FR9314870A patent/FR2713449B1/en not_active Expired - Fee Related
-
1994
- 1994-11-22 IL IL111726A patent/IL111726A/en not_active IP Right Cessation
- 1994-11-28 US US08/348,121 patent/US5640711A/en not_active Expired - Fee Related
- 1994-12-06 DE DE69418434T patent/DE69418434T2/en not_active Expired - Fee Related
- 1994-12-06 ES ES94402802T patent/ES2132360T3/en not_active Expired - Lifetime
- 1994-12-06 EP EP94402802A patent/EP0657111B1/en not_active Expired - Lifetime
- 1994-12-08 CA CA002137619A patent/CA2137619A1/en not_active Abandoned
- 1994-12-09 JP JP6306069A patent/JPH07267194A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE69418434T2 (en) | 1999-10-07 |
| IL111726A (en) | 1997-06-10 |
| DE69418434D1 (en) | 1999-06-17 |
| IL111726A0 (en) | 1995-01-24 |
| ES2132360T3 (en) | 1999-08-16 |
| FR2713449A1 (en) | 1995-06-16 |
| US5640711A (en) | 1997-06-24 |
| CA2137619A1 (en) | 1995-06-11 |
| EP0657111A1 (en) | 1995-06-14 |
| JPH07267194A (en) | 1995-10-17 |
| FR2713449B1 (en) | 1996-01-05 |
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